/*
 * Copyright (C) 2007-2008 Artima, Inc. All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Example code from:
 *
 * Programming in Scala (First Edition, Version 6)
 * by Martin Odersky, Lex Spoon, Bill Venners
 *
 * http://booksites.artima.com/programming_in_scala
 */

package org.stairwaybook.scells

class Model(val height: Int, val width: Int) 
    extends Evaluator with Arithmetic { 

  case class Cell(row: Int, column: Int) {
    var formula: Formula = Empty
    def value = evaluate(formula)

    override def toString = formula match {
      case Textual(s) => s
      case _ => value.toString
    }
  }

  val cells = new Array[Array[Cell]](height, width) 

  for (i <- 0 until height; j <- 0 until width) 
    cells(i)(j) = new Cell(i, j)
}
